/Engine/Source/Runtime/Slate/Public/Widgets/Layout/SSafeZone.h
Here's how you could make use of TitleSafe and ActionSafe areas: SNew(SOverlay)
+SOverlay::Slot()
[
 / ActioSafe SNew(SSafeZone) .IsTitleSafe( false ) ] +SOverlay::Slot() [ / TitleSafe SNew(SSafeZone) .IsTitleSafe( true ) ]
class SSafeZone : public [SBox](API\Runtime\Slate\Widgets\Layout\SBox)